Well ur not managing your PSUS to the max then i guess cause here is how my mine is set-up
I currently have 5 s3 Batch 3, 6 s1s
currently i have
3 s3 overclocked to 250 1 s1 undervolted on a 1300 EVGA psu 1272 Watts at wall
2 S3 overclocked to 250 3 S1 Undervolted on a 1300 EVGA PSU 1198 Watts at wall
2 S1 Overclocked on a 1300 EVGA PSU 928 Watts at wall
that's dandy, but your calculation does not show any $$ for power supplies.